Tractor



Dec. 13, 1927.

1,652,358 H. J. HEIDER TRACTOR Filed April 15, 1922 e Sheets-Sheet 1 Dec. 13, 1927.

H. J. HEIDER ,358

TRACTOR Filed April 13, 1922 6 Sheets-Sheet 2 Dec. 13, 1927. 1,652,358

, H. J. HEIDER TRACTOR Filed April 13, 1922 6 Sheets-Sheet 4 Dec. 13, 1927. 1,652,358

- H. J. HEIDER TRACTOR Filed April 13, 1922 6 Sheets-Sheet 5' nazmc Dec. 13, 1927.

' H; J. HEI-DER TRACTOR Filed April 1-3, 1922 6 Sheets-Sheet" 6 lllllllllllliliilll! I Patented Dec; 13,1927. i r

y STATES;

- jnmmrz.

names, or CARROLL, IOWA, AssIeNon'ro nocx rxstennirtow coMrAnY,

I OF ROCK ISLAND, ILLINOIS, A CORIPORA'IION OI ILLINOIS.

V rnacron- Application filed April '13, 192a Serial m. 55291;

My invention is an improved tractor and relates principally to the power transmission means from theengine, the .meansof supporting the case which incloses the gearing,

- the construction of the differential and other *Figsu; and 5' are, respectively, an elevation and section'of the brake-shoes: .1 1 v y *sltigiflisa-sid elevation, ar'tlyin section,

no nfthegearcase and inclosed geari Fig. 7 a transverse section on the line iFi-Tof' l igmfi. i lz'iFi :8 is a plan view-of the structure showgeneral arrangement and disposition eeleva ofthe di fierentr v v p 9 is a *s' of the complete 'h'actor. 7

Fig. 101s a plan view ofthe frame-of the tractor and gearcese. i f *l- Figril is a fragmentary perspective view showing the means "of supporting the front e mzl-ao'fthegearcase. f i v Fig; 12' in .side view of the frame of the tractor andlg'ear caseil ismovable longitudinallyof the frame upon ways 1." The; flywheel is utilized as a'fri'ction transmission wheel and for this purpose is pro vided upon its periphery with a fibre. 40 friction-band 2 adapted to cooperate with,

either of the steelfrictiondiscs 3 or 3 By nieans the longitudinal :a'dj ustment of the engine, whichmay'be efiected by a lever convenien tto the driver and suitable connections a i 5 such shown in my prior .Patent No.

.1,15,767; granted September '28,-1915,"the

flywheel may be'made to frictionally engage the friction discs near their periphery or; Y

centers or: at: intermediate l points,-thus estabany desired speed ratio between the shaft E and the friction disc a engine crank shaft 1). I "Their-lotion disc shaft D together with the *diiferential and all other geari ngis M mountediand inclosed in a gear case H. At

front end of thegear case and to the top of a view through the'rear axle, cerits rear end the gear caseis; supported on Y the rear-axle'housmg 1 and atits front end; by means of a relatively thin plate 4 bolted orotherwlse secured to the bottomof the the cross member 5, the upwardly projecting ends ofrwhich are secured to the side sills 6-,

6 of the frame. There is sufficient flexibility in the relatively thin 'plate' to .re1ievethe gear case of excessive strains and to prevent the transmission of such strains throughthe gear case to the rear axle or in the opposite directwn. I

discs 3, 3 and the power take-off pulley, J, all of which are keyed infixed relation there; to. Bali bearings 50 support shaft D 'inthe sidewalls ofthe. gear .case. The friction 1118083 and 3? are positioned on shaft D with their friction faces separated by a distance slightly: greater than the diameteriof the The shaft D carries both of the friction fibre friction ring ;2 on the periphery of the/friction flywheel, and the shaft: D

movable-"in the direction. of its axis/t0 an extent suflicient to bring either of the frictionudiscs 3, '3 into engaging frictiona1 contact with thefibre ring. 2'or, when in an intermediate positionito hold both of said friction: discs free of the fibre'ring.

Provision is thus made-for transmitting to disconnect saidshaft from'the engine. A

ring 8 isrotatablymountedin a groove in'a collar 7 fixed to shaft D. shaft 9, is an arm 10 havingpivotal connection with ring 8, thus affording means by a slight'rotary movement of shaft 9 for bringing either of thediscs 3, 3 into engagement With the fibre ring 2 with varying degreesof pressure or for holding both discs .outof en-' gagementtherewith. This-adj ustment to forward, reverse or neutrah'may be eflected by any suitable operating connections extending from shaft-9 to a pointtconvenient to the driver-,the shift lever beingshown in Fig.9 and also the bar IOI cOnnecting-the shift lever to-shaft'9.

C --by means of spiral gears ll, l2 fixed to said. shafts, the spiral gear 11 being'of ample thickness to preserve the mesh with gear 12 Fixed to vertical 7 Y Poweris transmitted from the friction gear shaft Dfto' intermediate or jack shaft in the different longitudinal adjustments of shaft {Power is transmitted-to the rear wheels through gearfllr-One of the prin} '7 s5 7 power to rotatefshaft D in eitherdirection or 2 i l a 1,652,358

acting friction members at that point where there will be neither sl ppagew1tlrconse quent failure to transmit all 01 the power nor excess pressure over and above that necessary to prevent slippage, which excess pressure also would cause loss ofpower by its absorption in the useless work of overcoming thezfriction caused by the excess pressure. By the use of spiral gears or equivalent means of transmission producing an end thrust upon the friction disc shaft D, I vary the pressurebetweenthe friction discs 3, 3 and the fibre ring 2 in proportion to the amount of power which is transmitted. By reason of the inclination of spiral gear teeth to the axis of the gear, transmission of power through such gears sets up an end thrust in the shafts upon which the gears are mounted and thisend thrust isof course proportional tot-he pressure uponthe gear teeth, the end thrustbeing a component of that pressure; The mag nitude of the end thrust is dependent upon and varies with the inclination of the teeth to the axes 10f the gears, the greater the inclination the greater being the end thrust. As illustrated in the drawing, the engine shaft turns in the direction indicated by the arrow 14, thus transmitting to the friction disc 3, which is shown in engagement with fibre ring 2, rotation in the direction indicated by the arrow13, with a resulting end thrust upon, shaft Din the direct-ion indicated by the arrow 15', thus setting up between the friction disc 3 and the fibre ring 2 pressure which is directly proportional to the pressure between the teeth of spiral gears 11 and 12 and hence proportional also to thepower being transmitted; W'hen the traction wheels K, K encounter increasedresistance, thereby causing increased resistance to therotation of gears 11 and 12, slippage of the friction gears is automatically prevented by reason of. the fact that the increased resistance causes increased pressure between theteeth of'the spiral gears, thus increasing the end thrust in shaft 1) with a proportional increase in the pressure be tween friction disc 3 and fibre ring 2.

When the friction drive is set for rotation of shaft D in the direction opposite to that indicatedby the arrows,i. e. with friction disc 3 disengaged anddisc El engaged with fibre ring 2, the end thrust in shaft D will be opposite to the direction indicated by arrow 15 andpressurewill be caused and automatically regulated between friction disc 3% and fibre ring 2 asabove described in connection with the transmission of power through disc 3. v 1 Two spur gears 15 and 16 of different diameters are slidably and uon-rotatably respectively by the mounted on the jack-shaft C and adapted to be moved one at a tune into engagement respectively with differential gears 17 and 18 or to be bothmoved out of enga ement with the dlll'erential. The gear shifting mechanism is shown insertion in Figure 7.

The gears 15 and 16 have hubs in which there are formed annular grooves engaged "ear shifting members 1!) and 20 with which suitable interlocking mechanism is connected to insure enga ement of only one of the gears at a time with a differential gear or disconnection of both therefrom. a l f The speed changes obtainable by moving the fly wheel Gwith its fibre friction ring toward and from the center of the friction discs 3 and 3 gives a sufficient range for either traction duty or for travel without heavy traction effort. It isvdesirable however, to provide means for obtainin a. higher speed ratio between the traction w eels and i engine to be used in road travel or whenever traction is less necessary than speedu It is for this reason that I provide the differential with the two gears 17 and 18 cooperating with the gear and gear shift mechanism abovedescribed. l a C l a The differential is shown insection inFigure 2 and the rear axle assembl 8. As will be observed, the entire differem tial mechanism is mounted on shaft Band held in assembled relation by means of'nuts 38 engaging theends of said shaft. The differential is a complete, self-contained unit.

The differential "gear rings 17, 18 are bolted to the spider or bevel pinion carrier 27 which in turn is centered on shaft B. t

in Figure Bevel pinions 28 are rotatabl mounted on spider 27 and coact with beve gears-29, 30 which are keyed respectively to spur pimons 21, 22 rotatably mounted on differential shaft B. In operation the spur pinion 21 and its attached bevel gear 29 function as a single1 element by reason of being shapedtogether. The same is true of pinion 22 and bevel30.

Bushings 33, 33 upon the shaft B form bearing for the pinions 21, 22. As shown in Fig ure 1, gears 21, 22 mesh respectively with gears 23, 24fixed to the axle section 25, 26. A web 34 projecting upwardly from the bottom of the gear case H aifords sup ort for roller bearings35, 36 at the inner en s of the axle sections, the outer ends of which' are ions 28 will revolve bodily with the differentialspider 27 without rotation upontheir are iii

bevelgear 30, thebevel pinions 28 will re-' volve on their axes ata rate sufiicient to distribute power to the bevels 29, 3O proportionately to the resistance transmitted to them by the tractor'wheels. Underthese conditions thegears 21, 22 will rotate on bushings 33 relative to shaft B. e I

What I claim as my invention is:

' the other i A power transmission comprising a shaft,

a pair of opposing friction disks fixed on said shaft, a friction wheel between and adapted to be engaged'by either or neither of said disks, a singlespiral gear fixed on said shaft between said disks and a cooperating spiral gear for driving said first named gear,

the teeth of said spiral gears beinginclined in a direction to set up an end" thrust acting to draw either. of said disks toward said wheel in closer frictional contact with the l a tter, and means for bodily shifting said shaft, its disks and its gear longitudinally of ear.

I Signed y me at Rock Island, 111., this 2 I day of March, 1922. v HENRY J. HEIDER. Y 

